/*
 * Autopsy Forensic Browser
 * 
 * Copyright 2011 Basis Technology Corp.
 * Contact: carrier <at> sleuthkit <dot> org
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.sleuthkit.autopsy.datamodel;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.openide.nodes.AbstractNode;
import org.openide.nodes.Children;
import org.openide.nodes.Node;
import org.openide.nodes.Sheet;
import org.openide.util.Lookup;
import org.openide.util.lookup.Lookups;
import org.sleuthkit.datamodel.BlackboardArtifact;
import org.sleuthkit.datamodel.BlackboardAttribute;
import org.sleuthkit.datamodel.BlackboardAttribute.ATTRIBUTE_TYPE;
import org.sleuthkit.datamodel.Content;
import org.sleuthkit.datamodel.Directory;
import org.sleuthkit.datamodel.File;
import org.sleuthkit.datamodel.Image;
import org.sleuthkit.datamodel.SleuthkitItemVisitor;
import org.sleuthkit.datamodel.SleuthkitVisitableItem;
import org.sleuthkit.datamodel.TskException;

/**
 *
 * @author dfickling
 */
public class BlackboardArtifactNode extends AbstractNode implements DisplayableItemNode{
    
    BlackboardArtifact artifact;
    Content associated;
    static final Logger logger = Logger.getLogger(BlackboardArtifactNode.class.getName());

    public BlackboardArtifactNode(BlackboardArtifact artifact) {
        super(Children.LEAF, getLookups(artifact));
        
        this.artifact = artifact;
        this.associated = getAssociatedContent(artifact);
        this.setName(Long.toString(artifact.getArtifactID()));
        this.setDisplayName(associated.accept(new NameVisitor()));
        this.setIconBaseWithExtension("org/sleuthkit/autopsy/images/artifact-icon.png");
        
    }
    
    @Override
    protected Sheet createSheet() {
        Sheet s = super.createSheet();
        Sheet.Set ss = s.get(Sheet.PROPERTIES);
        if (ss == null) {
            ss = Sheet.createPropertiesSet();
            s.put(ss);
        }
        final String NO_DESCR = "no description";

        Map<Integer, Object> map = new LinkedHashMap<Integer, Object>();
        fillPropertyMap(map, artifact);
        
        ss.put(new NodeProperty("File Name",
                                "File Name",
                                "no description",
                                associated.accept(new NameVisitor())));
        
        ATTRIBUTE_TYPE[] attributeTypes = ATTRIBUTE_TYPE.values();
        for(Map.Entry<Integer, Object> entry : map.entrySet()){
            if(attributeTypes.length > entry.getKey()){
                ss.put(new NodeProperty(attributeTypes[entry.getKey()-1].getDisplayName(),
                        attributeTypes[entry.getKey()-1].getDisplayName(),
                        NO_DESCR,
                        entry.getValue()));
            }
        }
        return s;
    }

    /**
     * Fill map with Artifact properties
     * @param map, with preserved ordering, where property names/values are put
     * @param content to extract properties from
     */
    public static void fillPropertyMap(Map<Integer, Object> map, BlackboardArtifact artifact) {
        try {
            for(BlackboardAttribute attribute : artifact.getAttributes()){
                switch(attribute.getValueType()){
                    case STRING:
                        map.put(attribute.getAttributeTypeID(), attribute.getValueString());
                        break;
                    case INTEGER:
                        map.put(attribute.getAttributeTypeID(), attribute.getValueInt());
                        break;
                    case LONG:
                        map.put(attribute.getAttributeTypeID(), attribute.getValueLong());
                        break;
                    case DOUBLE:
                        map.put(attribute.getAttributeTypeID(), attribute.getValueDouble());
                        break;
                    case BYTE:
                        map.put(attribute.getAttributeTypeID(), attribute.getValueBytes());
                        break;
                }
            }
        } catch (TskException ex) {
            logger.log(Level.SEVERE, "Getting attributes failed", ex);
        }
    }

    @Override
    public <T> T accept(DisplayableItemNodeVisitor<T> v) {
        return v.visit(this);
    }
    
    private static Lookup getLookups(BlackboardArtifact artifact) {
        Content content = getAssociatedContent(artifact);
        HighlightLookup highlight = getHighlightLookup(artifact, content);
        List<Object> forLookup = new ArrayList<Object>();
        forLookup.add(artifact);
        if(content != null)
            forLookup.add(content);
        if(highlight != null)
            forLookup.add(highlight);
        
        return Lookups.fixed(forLookup.toArray(new Object[forLookup.size()]));
    }
    
    private static Content getAssociatedContent(BlackboardArtifact artifact){
        try {
            return artifact.getSleuthkitCase().getContentById(artifact.getObjectID());
        } catch (TskException ex) {
            logger.log(Level.WARNING, "Getting file failed", ex);
        }
        throw new IllegalArgumentException("Couldn't get file from database");
    }
    
    private static HighlightLookup getHighlightLookup(BlackboardArtifact artifact, Content content) {
        if(artifact.getArtifactTypeID() != BlackboardArtifact.ARTIFACT_TYPE.TSK_KEYWORD_HIT.getTypeID())
            return null;
        Lookup lookup = Lookup.getDefault();
        HighlightLookup highlightFactory = lookup.lookup(HighlightLookup.class);
        try {
            List<BlackboardAttribute> attributes = artifact.getAttributes();
            String keyword = null;
            String regexp = null;
            for (BlackboardAttribute att : attributes) {
                if (att.getAttributeTypeID() == BlackboardAttribute.ATTRIBUTE_TYPE.TSK_KEYWORD.getTypeID()) {
                    keyword = att.getValueString();
                }
                else if (att.getAttributeTypeID() == BlackboardAttribute.ATTRIBUTE_TYPE.TSK_KEYWORD_REGEXP.getTypeID()) {
                    regexp = att.getValueString();
                }
            }
            if (keyword != null) {
                boolean isRegexp = (regexp != null && ! regexp.equals(""));
                return highlightFactory.createInstance(content, keyword, isRegexp);
            }
        } catch (TskException ex) {
            logger.log(Level.WARNING, "Failed to retrieve Blackboard Attributes", ex);
        }
        return null;
    }

    public Node getContentNode() {
        return associated.accept(new AbstractContentChildren.CreateSleuthkitNodeVisitor());
    }
    
    private class NameVisitor extends SleuthkitItemVisitor.Default<String> {
        
        @Override
        public String visit(Image img) {
            return img.getName();
        }
        
        @Override
        public String visit(Directory d) {
            return d.getName();
        }
        
        @Override
        public String visit(File f) {
            return f.getName();
        }

        @Override
        protected String defaultVisit(SleuthkitVisitableItem svi) {
            return "n/a";
        }
        
    }
    
}